Electric light fixture



Jan.

W. P. CROCKETT ET AL ELECTRIC LIGHT FIXTURE Filed July 30, 1934 f A ilPatented Jan. 4, i935 UNITE. STTES Naald ATE? OFFICE.

ELECTRIC LIGHT FIXTURE Application July 30, 1934, Serial No. 737,500

3 claims.

The invention relates to an electric light fixture, and particularly toa xture which includes a portable lamp which may be detachably held byan adjustable holder which may be clamped to furniture, work benches orother supports.

The invention has a relationship to the electric light fixture inventedby us which is the subject matter of United States Mtters Patent No.1,907,043, issued May 2, 1933.

The principal object of the invention is to provide an electric lightfixture which is removably secured to a support and which can be quicklydetached to furnish illumination for the user at any particular place orspot desired, and then be readily returned and attached to its support.The invention is therefore particularly applicable for use in hospitals,physicians, surgeons and dentists ofiices where close examinations andexplorations are frequently made, and where portability of the lightfixture is a necessity.

The xture of the invention is also oi particu--l lar utility inlaboratories, studios, garages, on work benches, and in fact in anyplace where light must be brought close to the person or object to beexamined. It will be obvious that the electric light xture may be usedas a reading lamp, or desk lamp for use in homes or oflices.

A further object of the invention is to provide the light fixture withmeans whereby the lamp handle and reflector may be firmly attached tothe clamping and supporting portion of the xture and locked into placeso that the parts cannot be casually separated or removed from eachother, and yet, by properly manipulating the locking mechanism, which issimple and easy to operate, the lamp holder and reflector may be readilydetached from the clamping and supporting portion of the xture.

, In connection with the detachable feature of the light xture to enablethe lamp to be used as a hand lamp or portable lamp in connection withexaminations or explorations, or any special work which may be requiredinvolving the removal of the lamp from its support, it is an importantobject of the invention to be able to quickly and readily lift the lampfrom its support and as quickly and readily replace it and lock it inposition.

In order to secure the last mentioned advantages the lamp fixture isprovided with spaced coacting locking means so that the lamp fixture maybe placed at any one of a plurality of positions in the holder of thesupport and locked into place and the reflector alone can be rotated toits desired position, to direct the light rays where they are desired.

Another object of the invention is to provide a cylindrical casing forthe light socket and the end portion of the light cord which will be ofstrong and unyieldable material, such as steel, to protect the lightsocket, to furnish a strong and durable support for the light reector,to provide a portion of the detachable locking means and also to providea handle for the portable lamp so n) that it may be readily grasped,removed from its holder and brought to the place or location for theexamination or exploration by the physician, surgeon, dentist, nurse orother person.

It is an object to provide the handle cylinder 1; with bayonet slotsturned in a contra-clockwise direction to assist in more rmly lockingthe handle cylinder and its cap at the time other portions of the handleare rotated in a clockwise direction to secure them in place. 2O

A further object of the invention is to combine a reflector and handleso that by rotation of one of the members, or both, as the case may be,they may be secured in place in order that the direction of the lightrays may be controlled.

Another object of the invention is to construct the handle in such amanner that a socket having a pull chain or cord or push buttons forvarying the volume of light from the lamp or turning the light on or offmay be used. 30

The invention will best be understood by reference to the accompanyingdrawing wherein the preferred form of electric light iixture and supportare shown.

In the drawing: 35

Figure l is an assembly view of the electric light xture employing thespaced co-acting locking means and pull cord for operating the lamp;

Figure 2 is a cross sectional View of the electric light fixture showingthe spaced (zo-acting lock- 40 ing mechanism, and showing the handlecylinder, connection with the reflector, end portion of the lockingmechanism and connections in section;

Figure 3 is an elevational view of the handle 45 lcylinder of Fig. 2showing the apertures in the end thereof and through the integral bossand connection with the cord, on the line ll-ll of Fig. 2;

Figure 4 is a view similar to that of Fig. 3 but 50 in addition showingin elevation the locking member of the fixture holder on the line l2--l2of Fig. 2;

Figure 5 is a cross sectional view of the integral boss shown inelevation in Fig` 3; 55

.- flector.

Figure 6 is a cross sectional view through the handle cylinder on theline |4-l4 of Fig. 1;

Figure '7 is a bottom plan view of the end portion of one or" themembers of the handle cylinder shown in Figs. l to 6 inclusive.

Like parts throughout the various views are given the same referencecharacters.

In the electric light fixture illustrated in Figs. 1 to '1 inclusive,there is shown the clamping and supporting mechanism, generallydesignated 28, and the cylindrical holder, generally designated 85,which carries the reector 23. The lamp socket 24 is shown in position inthe handle and the lamp bulb 25 is in position within the re- The xtureis provided with the support tube or rod 28 and the electric light cord39. The cord 39 has one end thereof secured in the lamp socket 24 andthe other end terminates in a plug and light socket.

The electric light iixture is adjustably secured to one end of thetubular rod 28. rIlwo arms 55 and 55a extend from the end of the tube 2Sand are rotatably connected with the arms 58 and 59a of the latch holder51. The four arms are connected together to permit adjustment. Aconnecting tubing is shown at 58, the screw bolt at 59, and the nut at69. The latch holder 51 is cut out to form the aperture 51a.

The latch holder 51 having the integral arms 59 and 59a has secured toit by the rivets 63 and 89 the spring latch 85 having the arcuate armsG6 and 51. The holder 51 is provided with two apertures. The lockingstud 18 which is riveted to the spring latch 65 extends through one ofthe apertures. An elongated spring latch button 1| is secured to thelower end of the spring latch 65 and extends through the other apertureof the spring latch holder. The spring latch button is provided with astop 12.

It will be observed that the spring latch 65 with its arms 66 and 61 ison the interior face of the spring latch holder 51 and extends towardthe tube 28 when pressure is exerted on the spring latch button 1|. Whenthe spring latch button 1| is moved to its farthest position through itsaperture it moves the end of the spring latch B inwardly and carrieswith it the attached locking stud 19.

One end of the light cord 30 passes through the exteriorly screwthreaded bushing 11 having on its end the hexagonal nut 18. The end ofthe cord is fastened in the usual manner to the socket 29- and throughwhich current for the lamp 25 is furnished. The screwthreaded bushing i1is adapted to screw into the cord connecting end 19 of the lamp socket24. The lamp socket 24 is operated by a pull cord or chain 89 throughthey cup 84 in the cylindrical holder 85.

The cylindrical holder 85 is composed of the cylindrical portion SB andthe cap 81. One end of the cylindrical portion 86 is formed with aU-shaped groove 88 to receive the reector 23. A washer 89 is inserted inthe groove between the reector 23 and one wall of the groove. As it isdesired that the reector rotate about the end of the cylindrical holderportion 89, and be held in any position to which it may be rotated, afriction fit in the groove is desired and therefore the washer 89 shouldbe of the proper thickness.

At the other end of the cylindrical holder portion 86 bayonet slots 98,preferably four in number, are provided. Each of these bayonet slots hasthe inner portion 9| of the slot turned in a contra-clockwise directionwhich is diierent from what is usually the case, to assist in thelocking of the cap 81 on the holder portion 86. and also to assist inlocking the connections of the cap 81 and the holding ring on the cord39.

To further assist in the locking of the cap 81 on the cylinder portion86, the bayonet slots 99 are also provided at the heads of their slotportions 9| with the added material 92 to restrict to some extent themouth of the passage of the portion of the slot 9|.

The end of the cylinder holder portion 85 containing the bayonet slots99 is also provided with an `elongated slot 93 between two of thebayonet slots 99 for the sliding into place of the pull chain cup 94 ofthe socket 24.

The cap 81 of the cylinder holder has its end 94 provided With a centralaperture 95 through which the end of the light cord 39 passes to bejoined to the socket 24. The end 94 is also provided with theperforations or apertures 9B, preferably four in number, equally spacedapart about the central aperture 95. The holder end 9d is also providedwith the squared boss 91. which is formed around the central aperture95. This squared boss is an integral part of the cap 81 and is formed toprovide a squared surface to fit into the aperture 51a of the latchholder 51 as shown in Figs. 2, 3 and 4 of the drawing.

A ring 98 is placed next to the square boss 91 and the sleeve 11, whichis provided with the hexagonal nut portion 18, is passed through thering 98 and the aperture 85. The end of the cord 39 passes through thehexagonal nut 18, sleeve 11, ring 98 and aperture 95. It will be obviousthat these last mentioned parts must be placed on the end of the cord 39before the end is secured in the lamp socket. It will also be obviousthat any required number of shims may be placed between the square boss91 and the ring 98 to permit the insertion in operative position of thelight fixture in the spring latch holder 51.

'Ihe end cap 81 of the cylindrical holder is also provided with aplurality of studs or punchings 99, preferably four in number, which aremade to register with the four bayonet slots 98 to lock the end cap 81into place on the cylinder portion 86.

After the end cap 81 has been brought into position at the end of theportion 88 by having the studs or punchings 99 passed into the slots 90and snapped into place past the added material 92 into the slot portion9|, the cap 81 will not ordinarily be removed therefrom until repairsare necessary.

In operating the light xture with relation to the fixture or latchholder, the fixture is placed in the latch holder 51 with the squaredintegral boss 91 in the aperture 51a. The light fixture is placed inposition in the latch holder 51 to its limit. By properly placing theboss 91 in the aperture 51a, the stud 10 may be snapped into any one ofthe apertures 99, in the end 94 of the cap 81, thus locking the lightfixture to the latch holder 51. It will be obvious that the apertures 96will have to be equally placed in position about the boss 91 as shown inFigs. 3 and 4, and it will also be obvious that the light xture may beplaced and locked in any one of the four positions permitted by theconstruction of the four apertures 98 and the four sided boss 91.

When the cylindrical handle cap 81 has been rotated to its normalposition with the studs or punchings 99 in their positions in the slotportions 9I, the cap 81 has been rotated in a contraclockwise directionand in a direction opposite to that of the nut 18. The exteriorlythreaded bushing 'l1 with the enlarged head or nut 18 is thereuponindependently rotated in a clock-wise direction in one end of the lightsocket 24 to the limit of its movement, thus eifectually locking all ofthe parts together.

When it is desired to release the light fixture from the extension clampholder and latch mechanism, pressure on the push button 1I will move thelatch spring inwardly and thereby remove the stud 10 out of theparticular aperture 96 in which it was placed. The light fixture maythen be withdrawn out of aperture 51a and used away from the clampsupport in any manner desired. In this-form of structure it will benoted that the xture may be placed in the latch holder in any one offour positions to t any one of the four apertures with reference to thereflector, as the reflector may be rotated to any position desiredwithout reference to the position of the cylindrical handle.

What we claim and desire to secure by Letters Patent is:

1. In an electric light xture of the portable type, a holder, a lightsocket in said holder, said light socket being provided with a pullchain cup, said holder being adapted to receive one end of a light cord,a holder carrier, a cap removably secured to said holder, said holderhaving a bayonet slot, and also a slot for said pull chain cup, said caphaving a stud or punching, said stud or punching being adapted to entersaid bayonet slot and operate in a contra-clockwise direction to locksaid cap and said holder, said cap also being provided with an integralsquare boss, said boss having an aperture for the reception of the lightcord, a thimble, said thimble being movable in a clockwise direction, awasher, said cord passing through said thimble, washer and boss intosaid socket, said holder carrier being cut away to enable said carrierto contact with two side walls of said square boss whereby said holderis held in position in said carrier.

2. In an electric light fixture of the portable type, a holder, a lightsocket in said holder, said light socket being provided with a pullchain cup, a holder carrier, a cap removably secured to said holder,said holder having a bayonet slot, and also a slot for said pull chaincup, said cap having a square integral boss, said cap also having astud, said stud being adapted to enter said bayonet slot and rotate in acontra-clockwise direction, a nut with an integral threaded bushing,said bushing extending through said boss and the end of said cap intosaid light socket, and said nut with its bushing being independentlyrotated in a clockwise direction in the light socket to the limit of itsmovement locking all of the parts together, said boss preventing aturning movement of said holder in the holder carrier and permitting theholder to be held against turning in four diierent positions in theholder carrier.

3. In an electric light fixture of the portable type, a holder, a lightsocket in said holder, said light socket being provided with a pullchain cup, a holder carrier, a cap removably secured to said holder,said holder having a bayonet slot, and also a slot for said pull chaincup, said cap having an angular integral boss, said cap also having astud, said stud being adapted to enter said bayonet slot and rotate in acontra-clockwise direction, a nut with an integral threaded bushing,said bushing extending through said boss and the end of said Cap intosaid light socket, and said nut with its bushing being independentlyrotated in a clock- Wise direction in the light socket to the limit of,f

its movement locking all of the parts together, said boss preventing aturning movement of said holder in the holder carrier, and permittingthe holder to be held against turning in a plurality of positions in theholder carrier.

WILLIAM P. CROCKE'I'I'. WILLIAM P. CROCKE'IT, JR.

